CN111760488A

CN111760488A - Concentration partition mixing flow stirring tank

Info

Publication number: CN111760488A
Application number: CN202010667941.6A
Authority: CN
Inventors: 徐红琴
Original assignee: 徐红琴
Current assignee: Suzhou pulun Electronic Technology Co.,Ltd.
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2020-10-13
Anticipated expiration: 2040-07-13
Also published as: CN113398819B; CN113398820A; CN111760488B; CN113398820B; CN113398819A

Abstract

The invention discloses a concentration-partitioned mixed flowing stirring tank which comprises a stirring tank, a motor, a rotor assembly, an overflowing assembly and a baffle plate, wherein the rotor assembly is arranged in the stirring tank along the horizontal direction, the rotor assembly comprises a main shaft and stirring blades, the stirring blades are arranged on the main shaft, one end of the main shaft penetrates through the side wall of the stirring tank and is driven to rotate by the motor, a bearing box is arranged on one side far away from the motor for double-end stability, double-end support is provided for the rotor assembly, the baffle plate is vertically arranged in the stirring tank and is parallel to the main shaft, and a flow outlet is formed in one side of the bottom of the stirring tank. The vertical setting of overflowing the subassembly is passed by the main shaft in the stirring pond, and it includes shell and inner shell with the main shaft axis to overflow the subassembly, and the inner shell has one section toper pipe and one end straight pipe, radially offers the drainage hole on the straight pipe, and the toper pipe section of inner shell is the macrostoma outwards, and the toper pipe section of inner shell is as the influent side that the fluid flows in the stirring pond.

Description

Concentration partition mixing flow stirring tank

Technical Field

The invention relates to the field of stirring devices, in particular to a concentration partition mixing flow stirring tank.

Background

Many occasions in industry need stirrers, and the stirring device fully stirs the materials to be mixed to make the components uniformly distributed, and then discharges the materials to the next working procedure for use.

In the prior art, the stirring effect of a stirring device is insufficient, most of stirrers rotate through a stirring impeller to stir fluid, thin and thick slurry impacts materials (mostly powder materials) which are not melted into the liquid to be dispersed and distributed, often powder which is not stirred uniformly is distributed in the fluid in a blocking manner and flows along with the fluid in a large particle form, a fluid layer is wrapped around the large particles which are not stirred uniformly, when moving to the vicinity of the stirring blade, the fluid layer replaces the large particles to contact with the stirring blade, and the fluid layer buffers the force applied to the large particles like an elastic layer, so that the large particles are not subjected to large stirring force, and cannot be broken by large impact and are stirred uniformly, from this and the inhomogeneous condition of mixing appears, and the inhomogeneous thick liquids of mixing directly use the condition that local strength greatly reduced appears easily, under most occasions, influence performance.

Disclosure of Invention

The invention aims to provide a concentration partition mixing flow stirring tank to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a concentration subregion mixes stirring tank that flows, including stirring the pond, including a motor, an end cap, a controller, and a cover plate, rotor subassembly and baffling board, the rotor subassembly sets up in the stirring pond along the horizontal direction, the rotor subassembly includes main shaft and stirring vane, stirring vane sets up on the main shaft, stirring pond lateral wall is worn out and is driven its rotation through the motor to main shaft one end, for bi-polar stability, can be in the one side of keeping away from the motor, set up a bearing box again, support for the rotor subassembly provides the bi-polar, the vertical setting of baffling board is in the stirring pond and parallel with the main shaft. The thick liquid of waiting to mix is poured into from the top in the stirring pond, the motor drives main shaft and stirring vane and rotates, it flows in the stirring pond to impel the thick liquid, flow to one side after from the baffling board spaced another inslot backward flow stirring vane's suction side, the process of circulation also is the process of stirring, cause the flow of thick liquid on a large scale, be favorable to the intensive mixing and make some bold group in the original thick liquid broken, make the thick liquid even, fully moistened by base fluid, become the high concentration mixture that the performance is excellent. The slurry is circularly stirred in the stirring tank, and is discharged out of the device through the outflow port after being uniformly stirred.

Concentration subregion mixed flow stirred tank still includes a plurality of subassemblies that flow, it is vertical to set up in the stirring pond to flow the subassembly, it is passed by the main shaft to flow the subassembly, it includes shell and inner shell to flow the subassembly, inner shell and shell all use the main shaft axis as the central line, the inner shell has one section conical duct and one end straight tube, radially set up the drainage hole on the straight tube, the radial interior surface of shell becomes whole through a plurality of radial spliced poles together with the radial outward appearance of inner shell is fixed, the region between inner shell and the main shaft is the inner shell runner, the region between inner shell and the shell is the intermediate layer runner, the conical duct section of inner shell is big mouth outwards, the conical duct section of inner shell is as the influent stream side that fluid flows in the stirring pond, the straight tube section. The flow passing assembly has a flow dividing function, the stirring blade blows water flow, when fluid flow passes through the flow passing assembly, the fluid flow can be divided, the fluid mass containing large particles which are not stirred open enters the inner shell flow passage with high probability, the fluid in a thin and thick state which is stirred open can enter the interlayer flow passage without hindrance, because the flow inlet side of the inner shell is a tapered conical pipe, the fluid in the inner shell flow passage accelerates, when entering the straight pipe section of the inner shell, the fluid has the maximum speed, the fluid entering the interlayer flow passage decelerates, the fluid has the minimum flow speed at the position between the straight pipe section of the inner shell and the interlayer of the outer shell, the flow speed is high, the pressure is low, the flow speed is low, the pressure is high, therefore, the pressure of the fluid in the interlayer flow passage is higher than that of the inner shell flow passage, then, the fluid in the interlayer flow passage enters the inner shell flow passage through the drainage hole, the uniform fluid in the thin and thick state impacts the large particles which are going through the inner, with the large granule impact ground breakage to reach the effect of misce bene, the large granule is when the inner shell runner gos forward, because the runner convergent, so the epaxial overflow area is littleer and littleer, the fluid around the large granule is more and more thin, plays the peeling off effect on the fluid layer around the large granule, just because the fluid that the outer surrounding of large granule is peeled off to the inner shell runner of convergent, can be so that the core of the thick liquid direct impact large granule that comes from the drainage hole, thereby the large granule is broken abundant.

Further, in the main shaft axial, overflowing subassembly and stirring vane alternate distribution and overflowing the existence of subassembly and can consume some fluid flow's power, so, set up stirring vane on overflowing the interval of subassembly and constantly provide power input for the paddle of waiting to stir, prevent that the flow rate of thick liquid from reducing, when overflowing the subassembly, the large granule core is peeled off and is influenced with crushing function.

Furthermore, the overflowing assembly also comprises a water-facing filter screen, one end of the water-facing filter screen is connected with the inflow side of the inner shell, the water-facing filter screen extends reversely with the same inclination as the conical surface of the inflow side of the inner shell, the outline of one side of the water-facing filter screen, which is far away from the inner shell, is the same as the outer outline of the outer shell, as shown, the presence of the water-facing screen allows large particles to pass into the flow channel of the inner casing with almost full probability, so that when fluid flows into the flow channel assembly, the large particles are intercepted and slide into the flow channel of the inner shell along the inner wall of the water-facing filter screen, and the slurry mixed uniformly can enter the interlayer flow channel through the water-facing filter screen with low resistance, large particles all flow through the inner shell flow channel, and are crushed and mixed to form small particles under the impact of the fluid stripped from the outer layer fluid and the drainage hole, so that the mixing and stirring capacity of the single overflowing assembly is further improved.

Furthermore, the overflowing assembly further comprises a water outlet filter screen, the water outlet filter screen is arranged on the water outlet side of the interlayer flow channel, the radial outer edge of the water outlet filter screen is connected with the outer shell, and the radial inner side of the water outlet filter screen is connected with the inner shell. The water outlet filter screen is used for providing a cutting force at the water outlet position of the interlayer flow channel, and a resistance is added at the outlet of the water outlet flow channel, so that the pressure is increased at the interlayer flow channel side of the drainage hole, more fluid in the interlayer flow channel enters the inner shell flow channel through the drainage hole, large particles are crushed in the vertical flow direction, and the mixing is more uniform.

Further, the rotor subassembly still includes broken sword, and broken sword setting is in the outward appearance of main shaft, and broken sword extends along main shaft axial, and broken knife tip is located the inner shell runner, and broken sword is with the fluid cutting in the inner shell runner, and when the large granule striking above that, can be further broken into the tiny particle.

Further, the main shaft comprises an inner shaft and a shaft sleeve which are sleeved with each other, the shaft sleeve is sleeved on the inner shaft and can axially slide along the inner shaft, the shaft sleeve is connected with the inner shaft in a transmission mode, end discs are arranged at two axial ends of the shaft sleeve respectively, a convex button is arranged on the outer surface of the end disc on the side of the head of the crushing cutter, a boss is arranged on the inner wall of the stirring pool, the boss and the convex button are arranged on the same center circle with the inner shaft as the axis, and a compression spring abutted against the inner wall of the stirring pool is arranged outside the. The structure realizes the axial movement of the crushing cutter, when the shaft sleeve rotates along with the inner shaft, the boss and the convex button are not contacted in most periods, the shaft sleeve is pressed by the compression spring, the convex button is abutted against the inner wall of the stirring pool, the crushing cutter is inserted into the flow channel of the inner shell at a deeper position, and the flow channel of the inner shell has a smaller flow area, so that large particles can be crushed into smaller small particles when passing through the large particles, sometimes, the large particles can be clamped between the crushing cutter and the inner wall of the inner shell, the large particles are not impacted by the flowing force of slurry enough to be separated from the clamping state, at the moment, the crushing cutter needs to be loosened, the shaft sleeve continues to rotate, when the convex button rotates to the boss position, the shaft sleeve is extruded and moves for a distance axially, the axial movement direction is the direction in which the crushing cutter is drawn out from the outlet side of the flow channel of the inner shell, therefore, the, broken when next time through overflowing the subassembly or stirring vane, so, prevent that large granule card from overflowing in the subassembly.

Furthermore, the flow passage assemblies distributed along the axial direction of the main shaft are provided with inner shell flow passages with gradually reduced flow passage areas at inlets. The inner shell runner is gradually narrow, and when the thick liquid flowed in the stirred tank, wherein the large granule that has not stirred evenly can be broken into very little particulate matter gradually in a broken way, reaches the effect of broken step by step.

Compared with the prior art, the invention has the beneficial effects that: the invention uses a circularly flowing stirring tank as a slurry mixing place, the circularly flowing slurry is discharged from a discharge device after being fully mixed, the slurry to be stirred is added from the upper part of the stirring tank, a rotating rotor assembly blows the slurry to circularly flow, stirring blades provide driving force and can play a certain stirring role, a flow passage assembly can obviously improve the crushing effect on large particles wrapped with a fluid layer, large particles flow through the flow passage assembly through an inner shell flow passage, outer layer fluid is stripped, a core part is impacted by thin and thick slurry vertical to the flow direction and is crushed into small particles under the action of a crushing knife, the purpose of mixing and stirring is achieved, the completely stirred slurry is discharged from an outflow port, the gradually reduced flow area of the inner shell flow passage continuously reduces the particle size of particles which are not stirred, and the crushing knife moves axially along with the main shaft, the particles clamped between the inner wall of the inner shell and the crushing knife are cleaned, and the particles which are not crushed enter the overflowing assembly at another posture when entering the overflowing assembly next time and are crushed and stirred uniformly.

Drawings

In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

FIG. 1 is a front view sectional schematic view of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a block diagram of the overcurrent assembly of the present invention;

FIG. 4 is a left side view of FIG. 3 with the water-engaging screen removed;

FIG. 5 is a schematic perspective view of the water-exposed screen of the present invention;

FIG. 6 is a block diagram of a rotor assembly of the present invention;

FIG. 7 is a schematic view of the homogenizing principle of the present invention.

In the figure: 1-stirring pool, 21-motor, 22-bearing box, 3-rotor component, 31-main shaft, 311-inner shaft, 312-shaft sleeve, 3121-end disc, 3122-convex button, 32-stirring blade, 33-crushing cutter, 4-overflowing component, 41-outer shell, 42-inner shell, 421-drainage hole, 43-water-facing filter screen, 44-water outlet filter screen, 401-inner shell flow channel, 402-interlayer flow channel, 5-baffle plate, 6-outlet port, 81-boss, 82-compression spring, 91-large particle and 92-small particle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, a concentration-partitioned mixing flow stirring tank, which comprises a stirring tank 1, a motor 21, a rotor assembly 3 and a baffle plate 5, wherein the rotor assembly 3 is arranged in the stirring tank 1 along the horizontal direction, the rotor assembly 3 comprises a main shaft 31 and a stirring blade 32, the stirring blade 32 is arranged on the main shaft 31, one end of the main shaft 31 penetrates through the side wall of the stirring tank 1 and drives the main shaft to rotate through the motor 21, for the stability of the two ends, a bearing box 22 is arranged on one side far away from the motor 21, the rotor assembly 3 is provided with two-end support, the baffle plate 5 is vertically arranged in the stirring tank 1 and is parallel to the main shaft 31, and an outflow port 6 is arranged on one side of the. The thick liquid that waits to mix is poured into from the top to stirring pond 1, motor 21 drives main shaft 31 and stirring vane 32 and rotates, it flows in stirring pond 1 to impel the thick liquid, flow to one side after from baffling board 5 spaced another inslot backward flow stirring vane 32's suction side, the process of circulation is the process of stirring also, cause the flow of thick liquid on a large scale, be favorable to the intensive mixing and make some bold lumps in the original thick liquid broken, make the thick liquids even, fully moistened by base liquid, become the high concentration mixture that the performance is excellent. The slurry is circularly stirred in the stirring tank 1, and is discharged out of the device through the outlet 6 after being uniformly stirred.

As shown in fig. 1, 3, 4, and 7, the concentration-partitioned mixed-flow stirring tank further includes a plurality of flow-through assemblies 4, the flow-through assemblies 4 are vertically disposed in the stirring tank 1, the flow-through assemblies 4 are penetrated by the spindle 31, each flow-through assembly 4 includes an outer shell 41 and an inner shell 42, the inner shell 42 and the outer shell 41 both use the axis of the spindle 31 as the center line, the inner shell 42 has a section of conical tube and a straight tube with one end, the straight tube is radially provided with a drainage hole 421, the radially inner surface of the outer shell 41 and the radially outer surface of the inner shell 42 are fixed together into a whole by a plurality of radial connecting columns, the area between the inner shell 42 and the spindle 31 is an inner shell flow channel 401, the area between the inner shell 42 and the outer shell 41 is an interlayer flow channel 402, the conical tube section of the inner shell 42 has a large opening facing outward, the conical. The flow passing assembly 4 has a flow dividing function, the stirring blade 32 blows the water flow, when the fluid flow passes through the flow passing assembly 4, the fluid flow is divided, a large probability of a fluid mass containing large particles which are not stirred away enters the inner shell flow passage 401, the fluid in a thin and thick state which is stirred away can enter the interlayer flow passage 402 without hindrance, because the inflow side of the inner shell 42 is a tapered conical pipe, the fluid in the inner shell flow passage 401 flows at an accelerated speed, when the fluid enters the straight pipe section of the inner shell 42, the fluid has a maximum speed, the fluid entering the interlayer flow passage 402 flows at a decelerated speed, the fluid in the interlayer position between the straight pipe section of the inner shell 42 and the outer shell 41 has a minimum flow speed, the flow speed is high, the pressure is low, the flow speed is low, the pressure is high, therefore, the pressure of the fluid in the interlayer flow passage 402 is higher than that of the inner shell flow passage 401, and then the fluid in the interlayer flow passage 402 enters the inner, the thick state even fluid is with the perpendicular flow direction impact from the inner shell runner 401 the big granule 91 that is passing through, it is broken with big granule 91 impact, thereby reach the effect of misce bene, when big granule 91 gos forward at inner shell runner 401, because the runner convergent, so the ascending area of overflowing of axial is littleer and more, the fluid around the big granule 91 is thinner and more, play the peeling off effect of the fluid layer around the big granule 91, just because the fluid that the tapered inner shell runner 401 surrounds big granule 91 is peeled off, can make the thin thick liquid that comes from drainage hole 421 directly impact the core of big granule, thereby big granule 91 is broken fully.

In the main shaft 31 axial, overflowing subassembly 4 and stirring vane 32 distribute alternately and overflow the existence of subassembly 4 and can consume some fluid flow's power, so, set up stirring vane 32 and constantly provide power input for the paddle that waits to stir on overflowing subassembly 4's interval, prevent that the flow velocity of thick liquid from reducing, when overflowing subassembly 4, the large granule core is peeled off and is influenced with crushing function.

As shown in fig. 3 and 5, the flow-passing assembly 4 further includes a water-facing screen 43, one end of the water-facing screen 43 is connected to the inflow side of the inner casing 42, the water-facing screen 43 extends in the opposite direction with the same inclination as the conical surface of the inflow side of the inner casing 42, and the side of the water-facing screen 43 away from the inner casing 42 has the same contour as the outer contour of the outer casing 41, as shown in fig. 7, the presence of the water-facing screen 43 enables large particles to go into the inner casing flow channel 401 with almost full probability, the large particles 91 hit the water-facing screen 43 when flowing to the flow-passing assembly 4, the large particles are intercepted and slide into the inner casing flow channel 401 along the inner wall of the water-facing screen 43, and the uniformly mixed slurry can enter the interlayer flow channel 43 through the water-facing screen 43 with low resistance, the large particles 91 all flow through the inner casing flow channel 401, and are crushed and mixed by the fluid of the peeled outer layer and, further improving the mixing and stirring capacity of the single-pass flow-through assembly 4.

As shown in fig. 3 and 7, the flow-passing assembly 4 further includes a water outlet screen 44, the water outlet screen 44 is disposed on the water outlet side of the sandwiched flow channel 402, the radial outer edge of the water outlet screen 44 is connected to the outer shell 41, and the radial inner side of the water outlet screen 44 is connected to the inner shell 42. The water outlet filter screen 44 is used for providing a cutting force at the water outlet of the interlayer flow channel 402, a resistance is further added at the outlet of the water outlet filter screen 44 at the water outlet of the water outlet flow channel 402, pressure is increased at the side of the interlayer flow channel 402 of the drainage hole 421, more fluid in the interlayer flow channel 402 enters the inner shell flow channel 401 through the drainage hole 421, large particles 91 are crushed in the vertical flow direction, and mixing is more uniform.

As shown in fig. 3, the rotor assembly 3 further includes a crushing blade 33, the crushing blade 33 is disposed on the outer surface of the main shaft 31, the crushing blade 33 extends axially along the main shaft 31, the tip of the crushing blade 33 is located in the inner casing flow passage 401, the crushing blade 33 cuts the fluid in the inner casing flow passage 401, and when the large particles 91 impact thereon, the large particles can be further crushed into small particles 92.

As shown in fig. 3 and 6, the main shaft 31 includes an inner shaft 311 and a shaft sleeve 312 which are sleeved in layers, the shaft sleeve 312 is sleeved on the inner shaft 311 and can slide axially along the inner shaft 311, the shaft sleeve 312 is in transmission connection with the inner shaft 311, end discs 3121 are respectively disposed at two axial ends of the shaft sleeve 312, a convex button 3122 is disposed on an outer surface of the end disc 3121 at the tip side of the crushing knife 33, a boss 81 is disposed on an inner wall of the stirring tank 1, the boss 81 and the convex button 3122 are disposed on the same central circle with the inner shaft 311 as an axis, and a compression spring 82 abutted against the inner wall of the stirring tank 1 is disposed outside the end disc 3121 at. The structure realizes the axial movement of the crushing knife 33, when the shaft sleeve 312 rotates along with the inner shaft 311, most of the period, the boss 81 is not contacted with the convex button 3122, the shaft sleeve 312 is pressed by the pressing spring 82, the convex button 3122 is abutted against the inner wall of the stirring pool 1, the crushing knife 33 is inserted into the inner shell flow channel 401 at a deeper position, the inner shell flow channel 401 has a smaller flow area, therefore, the large particles 91 can be crushed into smaller particles 92 when passing through, sometimes, the large particles 91 can be clamped between the crushing knife 33 and the inner wall of the inner shell 42, the flow force of the slurry is not enough to impact the large particles 91 to separate from the clamping state, at this time, the crushing knife 33 needs to be loosened, when the shaft sleeve 312 continues to rotate, the convex button 3122 rotates to the boss 81 position, the shaft sleeve 312 is squeezed and moves axially for a distance, the axial movement direction is the direction in which the crushing knife 33 is drawn out from, the flow area between the crushing blade 33 and the inner casing 42 becomes large, and the large particles 91 that are stuck can be released to flow backward, and crushed when passing through the flow passing assembly 4 or the stirring vane 32 next time, so that the large particles 91 are prevented from being stuck in the flow passing assembly 4.

The flow passage assembly 4 axially distributed along the main shaft 31 has an inner casing flow passage 401 with a gradually smaller flow passage area at the inlet. Inner shell runner 401 is gradually narrow, and when the thick liquid flowed in stirring pond 1, wherein the large granule that has not stirred evenly can be broken into very little particulate matter gradually in a broken way, reaches the effect of broken step by step.

The main use process of the device is as follows: wait that the thick liquid of stirring is added by stirring pond 1 top, the rotatory rotor subassembly 3 that gets up is with the thick liquid whirling circulation flow, stirring vane 32 provides also can play some stirring effect when the drive force, and it can show the improvement to overflow subassembly 4 and have the crushing effect of the large granule 91 of fluid layer to wrap up around, large granule 91 flows through overflow subassembly 4 via inner shell runner 401, outer layer fluid is peeled off, the core receives the impact of the thin thick liquid of perpendicular to flow direction and the effect of broken sword 33 and is broken into tiny particle 92, reach the purpose of mixing stirring, the thick liquid of whole after homogenizing is from outflowing port 6 eduction gear.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a concentration subregion mixes flowing stirred tank which characterized in that: the concentration-partitioned mixed flowing stirring tank comprises a stirring tank (1), a motor (21), a rotor assembly (3) and a baffle plate (5), wherein the rotor assembly (3) is arranged in the stirring tank (1) along the horizontal direction, the rotor assembly (3) comprises a main shaft (31) and stirring blades (32), the stirring blades (32) are arranged on the main shaft (31), one end of the main shaft (31) penetrates out of the side wall of the stirring tank (1) and drives the stirring tank to rotate through the motor (21), the baffle plate (5) is vertically arranged in the stirring tank (1) and is parallel to the main shaft (31), and a flow outlet (6) is formed in one side of the bottom of the stirring tank (1).

2. A concentration-partitioned mixing flow agitation tank according to claim 1, wherein: the concentration partition mixed flow stirring tank further comprises a plurality of overflowing assemblies (4), the overflowing assemblies (4) are vertically arranged in the stirring tank (1), the overflowing assemblies (4) are penetrated through by the spindle (31), each overflowing assembly (4) comprises an outer shell (41) and an inner shell (42), the inner shells (42) and the outer shells (41) both use the axis of the spindle (31) as a central line, each inner shell (42) is provided with a section of conical pipe and a straight pipe with one end, a drainage hole (421) is radially formed in each straight pipe, the radial inner surface of each outer shell (41) and the radial outer surface of each inner shell (42) are fixed together into a whole through a plurality of radial connecting columns, an area between each inner shell (42) and the corresponding spindle (31) is an inner shell flow channel (401), an area between each inner shell (42) and each outer shell (41) is an interlayer flow channel (402), and the conical pipe sections of the inner shells (42) are large openings facing, the conical pipe section of the inner shell (42) is used as the inflow side of the fluid flowing in the stirring tank (1).

3. A concentration-partitioned mixing flow agitation tank according to claim 2, wherein: the overflowing assemblies (4) and the stirring blades (32) are alternately distributed in the axial direction of the main shaft (31).

4. A concentration-partitioned mixing flow agitation tank according to claim 2, wherein: the overflowing assembly (4) further comprises a water-facing filter screen (43), one end of the water-facing filter screen (43) is connected to the inflow side of the inner shell (42), the water-facing filter screen (43) extends reversely with the same inclination of the conical surface of the inflow side of the inner shell (42), and the outline of one side, away from the inner shell (42), of the water-facing filter screen (43) is the same as the outline of the outer shell (41).

5. A concentration-partitioned mixing flow agitation tank according to claim 2, wherein: the overflowing assembly (4) further comprises a water outlet filter screen (44), the water outlet filter screen (44) is arranged on the water outlet side of the interlayer flow channel (402), the radial outer edge of the water outlet filter screen (44) is connected with the outer shell (41), and the radial inner side of the water outlet filter screen (44) is connected with the inner shell (42).

6. A concentration-partitioned mixing flow agitation tank according to claim 2, wherein: the rotor assembly (3) further comprises a crushing knife (33), the crushing knife (33) is arranged on the outer surface of the main shaft (31), the crushing knife (33) axially extends along the main shaft (31), and the pointed end of the crushing knife (33) is located in the inner shell flow passage (401).

7. A concentration-partitioned mixing flow agitation tank according to claim 6, wherein: the main shaft (31) comprises an inner shaft (311) and a shaft sleeve (312) which are sleeved in layers, the shaft sleeve (312) is sleeved on the inner shaft (311) and can slide along the axial direction of the inner shaft (311), the shaft sleeve (312) is in transmission connection with the inner shaft (311), end discs (3121) are respectively arranged at two axial ends of the shaft sleeve (312), a convex button (3122) is arranged on the outer surface of the end disc (3121) at the tip side of the crushing cutter (33), a boss (81) is arranged on the inner wall of the stirring tank (1), the boss (81) and the convex button (3122) are arranged on the same center circle with the inner shaft (311) as the axis, and a compression spring (82) which is abutted against the inner wall of the stirring tank (1) is arranged outside the end disc (3121) at the cutter back side of.

8. A concentration-partitioned mixing flow agitation tank according to claim 2, wherein: the flow passage assembly (4) axially distributed along the main shaft (31) is provided with an inner shell flow passage (401) with the flow passage area at the inlet gradually reduced.